Combined packer and swab



Dec. v21 1926.

P. ARBON COMBINED PACKER'AND SWAB Filed August 1. 1924 INVENTOR.

' ATTORNEY.

Patented Dec. 21, 1926.

FElQE.

PAUL ARBON, OF TULSA, OKLAHOMA.

CQMBINED PACKER AND SWAB.

Application filed August 1, 1924. Serial No. 729.496.

struction will more clearly hereinafter ap-,

pear by reference to the accompanying drawings forming a part of this application and wherein like numerals of reference designate corresponding parts throughout the several views, in which Fig. 1 is a vertical section.

Fig. 2 is a side elevation of the socket,

Fig. 3 is a side elevation of the sub, and

Fig. 4: is a side elevation showing the sub attached, parts being broken away in section.

Referring to the drawings, a section of tubing 1 formed with perforations 2 medially of its ends is externally threaded at its lower end and its upper end is slightly enlarged and internally threaded. Directly beneath the enlarged internally threaded portion the perforated tubing is externally threaded as at 3 to permit expansion of the rubber packer 4 arranged thereon by the ad justment of the nut 5. The lower end of the pac er 4 is supported by the collar 6. The wall of the collar 6 is reduced internally at its lower end and is internally threaded for the reception of the externally threaded upper extremity of the tube section 7 which forms a chamber for the movement of the lower end of the tubing 1. The movement of this tubing occurs during the expansion and contraction of the packer 4 and is regulated by virtue of the collar 8 which is in threaded engagement therewith.

The lower extremity of the tube section 7 is considerably reduced and is threaded for the reception of the check valve 9 of con ventional design in the swab art.

The upper internally threaded enlarged end of the tube 1 is designed for the reception of either the lower threaded portion of the swivel socket 10 or the sub 1!. The swivel 10 is formed with a longitudinal bore slightly reduced at 11 to form a shoulder for engagement with the upper end of the slip 12 in which the cable end is secured. The wall of the slip chamber of the swivel is formed with a plurality of series of spaced perforations 13 to permit the escape of the fiui-d and is threaded at 14 to permit engagement with the upper end of the tube 1.

The sub 15 has tapered threaded portion 16 for engagement with conventional tool sockets and lower threaded extension 17 which is of suitable size to engage the threaded upper end of the tube 1 As shown at 18 a vertical passage extends. axially of the sub and radiating passages 19 communicate therewith to permit passage of fluid therethrough.

The packer swab is primarily a bottom hole packer which is set by the weight of the tubing above it. When the tubing reaches the bottom of the hole the weight above the packer forces the hollowed-out rubber upwards, thereby collapsing it outwardly until it completely fills the casing and at the same time making a perfect seal. The final weight of the tubing is not, however, taken entirely upon the rubber packing as the tul ing collar attached to the lower end of the main nipple will meet the lower end of the swedge at the same time the packer is fully collapsed.

In the case of surplus gas raise the tub ing and the rubber packing will instantly return to its normal shape. If at any time the packer should be caught or stuck in the casing, move the tubing up and down and jar the packer from its seat.

To use the packer as a swab when running with the tools, attach check valve to lower end of tube 7, and the sub to upper collar. The holes in the sub are to'allow a free passsage for the fluid to pass when the swab is descending. By turning the threaded collar the rubber can be expanded to the size required to take the casing.

To use the packer as a swab when running alone or without the tools, the check valve should be attached as in previous case and a swivel socket with the line babbittcd should be used. The action of the swab when running in will be that the fluid will pass through the swab and out of the slush holes in the socket. When pulling out, the check valve on the bottom end of the swab will close and the pressure will expand the concave rubber, which pressure is admitted through holes in the main or swab nipple. It will, therefore, not be necessary to set up llitl the rubber as in the case when running with the tools. The use of a swivel socket is a distinct advantage as the twist can run back in the line, thereby saving it from kinking which is frequent in swabbin \Vhat I claim as new and useful and desire to secure by Letters Patent, is

1. In a combined packer and swab, a valve casing having a tubular extension, an annular member fixed to said extension, a perfo rated tube extending loosely through the air nular member into the tubular extension, an abutment arranged at lower end of the tube to permit said lower end of the tube to move axially in the tubular extension, but prc venting the tube from being withdrawn through the annular member, a flexible tubular packer surrounding the tube and resting on said annular member, a cap arranged on the tube and bearing upon the upper end of the packer, a threaded extension provided at the upper end of the tube, and a member connected to said threaded extension and having apertures communicating with said tube.

In a combined packer and swab, a tube, a valve casing having a tubular extension in which the lower end of the tube is slidable, a tubular packin surrounding the tube, inanual means for expanding said packer, fluid pressure means for expanding the packer, both of said means permitting the lower end of the tube to move into the tubular extension, when suflicient weight is exerted on the upper end of the tube, and a suspend ing means connected to the other end of the tube and provided with perforations communicating with said tube.

3. In a device of the class described, a check valve having a tubular extension, a tube having its lower end slidable in said tubular extension, a tubular packer surrounding the tube, manual and fluid pressure means for expanding said packer, said means permitting the lower end of the tube to move downwardly into said tubular extension, when sufiicient weight is exerted on the upper end of the tube, a swivel socket, detachably connected to said tube, and ports to permit fluid travelling through the tube,

to enter or leave the latter, above said packer.

l. In a combined packer and swab, a check valve casing provided with a tubular extension, a tube having its lower end slidably arranged in said extension, said tube being perforated intermediate its ends, a tubular packing surrounding the tube and having a chamber where the perforations are located to permit fluid from the tube to expand said packing, an abutment engaging the lower end of the packer and lixed to said tubular extension, an adjustable abutment mounted on the tube and engaging the upper end of the packer to permit manual expansionof the latter, and a perforated suspension member connected to the other end of the tube.

5. In a device of the class described, a valve casing, a tubular member connected to the valve casing, a tube having its lower end slidably mounted in said tubular member and provided intermediate its ends with perforations, a tubular flexible packer sur rounding the tube and adapted to be expanded by a fluid passing through said perforations, manually operated means for expanding said packer, a swivel socket detachably connected to the upper end of the tube,

and ports above the packer communicating with said tube.

6. In a combined packer and swab, a check valve casing, a tubular member connected to the casing, an annular cap for the tubular member, a perforated tube slidable in said cap, an enlargement on the end of the tube to prevent the tube from being withdrawn from the cap when the tube is lifted upwardly, a flexible tubular packer surrounding the tube and bearing against said cap, said packer being adapted to be expanded by fluid under pressure passing through the perforations to the tube, a nut threaded on the tube and bearing upon the.

packer to permit manual expansion of the latter, an internal threaded socket arranged at. the upper end of the tube, a suspension member having a threaded pin engaging said socket, and ports arranged above the packer and communicating with said tube.

In testimony whereof. I aflix my signature.

PAUL AKRON. 

